Adam Lambert Turns 28 With...Lindsay Lohan?!

The American Idol runner-up celebrates his birthday with family and friends, including LiLo! Find out why she was at the fete

It was a good weekend for Adam Lambert!

Not only did the American Idol alum hit the Grammys on Sunday, he celebrated his 28th birthday Saturday night in style.

The singer threw a soiree at the Mondrian's ADCB restaurant for 100 family members and friends, including his mom, ex-beau Drake Labry and Lindsay Lohan.

So what exactly was Lindsay doing there?

It just so happens that Sam Ronson was deejaying the soiree. Coincidence? We think not.

In fact, our source doesn't even know if L.L. was actually invited.

"I think she knows Adam, but I don't get the vibe they are great pals," a source tells E! News. "She was of course friendly and nice to him, but I have a feeling it was more about Sam being there."

According to our source, Linds did talk to Sam for a bit, but things seemed more platonic and less romantic between the former flames.

Nice to see they can get through one night with no drama!

—Additional reporting by Whitney English

Check out other famous fetes in our Celebrity Birthday Bashes gallery!